The neighbors say they smell marijuana coming from the inside all the time.

This can be very therapeutic and a real stress reliever in these situations . 

I was convicted of felony possession of marijuana in early 2015.

In order to help alleviate these difficulties, and to enhance his/her ability to live independently and to fully use and enjoy the dwelling unit you own and/or administer, I am prescribing an emotional support animal that will assist [FIRST NAME] in coping with his/her disability.I am familiar with the voluminous professional literature concerning the therapeutic benefits of assistance animals for people with disabilities such as that experienced by [FIRST NAME].

As of Jan 1 14 selling marijuana will be legal here in CO where bandit signs will continue to be illegal.

Also if marijuana is legal I also will not allow it.That is just one example but there are many others which are property specific (who cuts the lawn) etc that you may need to think of.

Just looking for options.I had originally thought they hired a professional cleaner to remove the smell of marijuana. 

Guy shows up to see a rental at 9 am, reeking of marijuana and had bloodshot eyes.

We are in a state that allows medical use and recreational use of marijuana, but we can still say no to smoking on our property.

With the HIPPA  Laws being in place how do you know your tenant is using medical marijuana or the marijuana they bought on the corner from a dealer and is it legal to ask in some states?